Method and device for testing stray light
A stray light and light source technology, applied in the field of stray light testing and evaluation, can solve the problems of reduced contrast, inability to specifically obtain the position and size of stray light effects, and achieve the effect of improving accuracy
Active Publication Date: 2022-05-20
WUHAN JINGLI ELECTRONICS TECH +1
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Problems solved by technology
[0003] For the stray light of the imaging system, it can generally be called ghost image or glare. The reason for them is that the light reflected by the lens surface is scattered in the lens barrel and the light inside the camera. These reflected lights cover the picture. reduce the contrast
Although this glare can be effectively reduced by using advanced coated lenses or by using hoods, it is still necessary to test stray light and analyze their impact
[0004] The current stray light test system mainly uses a collimator and an integrating sphere or two integrating spheres for testing. The collimator or the front integrating sphere provides uniform illumination, and the rear integrating sphere provides the background (to ensure black). Illumination changes before and after the system can draw conclusions about the existence of stray light and its severity, but the current test method cannot specifically obtain the impact position and size of stray light
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[0051] The following will be combined with the drawings in the embodiment of the present application, the technical solution in the embodiment of the present application is clearly and completely described, obviously, the embodiment described is part of the embodiment of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without doing creative labor, are within the scope of protection of the present application.
[0052]The flowchart shown in the drawings is only an example description, not all content and operations / steps must be included, nor must it be performed in the order described. For example, some actions / steps can also be decomposed, combined, or partially merged, so the order in which they are actually performed may change depending on the actual situation.
[0053] See Figure 1 As shown, embodiments of the present invention provides a method of ...
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The invention discloses a method and device for testing stray light, which relates to the field of test and evaluation of stray light. The method comprises the following steps: obtaining the full field of view of the imaging system to be tested by the stray light generated by each local light-emitting area at a set position The influence of brightness; according to the influence of stray light generated by all local light-emitting areas on the brightness of the whole field of view, the position and size of the impact of stray light on the imaging system under test are obtained. The method for testing stray light in the present invention can locate and quantitatively analyze the influence of stray light.
Description
Technical field [0001] The present invention relates to the field of test evaluation of stray light, specifically to a method and apparatus for testing stray light. Background [0002] In optical systems, for imaging optical systems, any light rays that are not desired but have been propagated to reach the detector surface are stray light; for non-imaging optical systems, any imaging or other unintended light propagation forms a spot is stray light. [0003] For the stray light of the imaging system, it can generally be called ghost image, or glare, and the reason for them is caused by the random light reflected on the lens surface inside the lens barrel and the camera interior, which covers the picture and reduces the contrast. Although this glare can be effective in reducing this glare by using lenses that have been treated with advanced coatings or by using a hood, it is still necessary to test stray light and analyze their effects. [0004] The current stray light test system...
Claims
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IPC IPC(8): G01M11/02
CPCG01M11/02
Inventor 洪志坤宁谦郑增强欧昌东刘荣华
Owner WUHAN JINGLI ELECTRONICS TECH